Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Thu Sep 17 15:45:44 2026 Auto Mode Machine = Linux oleg304-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg304-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 1303 4573 345563 308970 64 8 2598 25236 255213 608965 64 16 3054 39529 703068 901377 64 32 4917 34557 889431 821391 64 64 3554 7344 1392258 1518251 128 4 6907 8323 631014 499970 128 8 4950 20119 852438 653282 128 16 2544 8737 1000121 684081 128 32 3875 32144 1243315 859260 128 64 6530 56710 1111981 1175271 128 128 6885 40583 901083 1778862 256 4 5364 7355 354978 386126 256 8 7230 5191 649647 736041 256 16 5587 23262 930608 1032636 256 32 14858 46723 1053922 1235882 256 64 15898 61536 1332507 1280084 256 128 8967 53145 1570244 778183 256 256 8326 26283 1778290 1495866 512 4 4077 14204 397770 537838 512 8 5024 8729 925717 435347 512 16 5002 13393 304745 584539 512 32 16064 21428 1066380 665926 512 64 14045 49732 704368 374530 512 128 14025 61575 619084 1309596 512 256 12200 76328 1289930 327170 512 512 13099 40157 807383 272772 1024 4 7743 6169 136426 150654 1024 8 13460 7054 235510 316439 1024 16 11353 22336 1190465 334843 1024 32 24748 41043 692311 1139005 1024 64 24390 40706 485043 605282 1024 128 27398 54692 1195102 1144163 1024 256 31717 85970 1254808 1265531 1024 512 16542 38512 1414304 1503942 2048 4 3599 4435 212491 338749 2048 8 7297 9662 282435 871118 2048 16 11827 12561 1095821 332083 2048 32 14122 20004 244833 1149185 2048 64 21361 40969 315368 422612 2048 128 14357 38709 1558743 965616 2048 256 34788 37800 413976 194642 2048 512 29013 67332 1788524 1673209 4096 4 7578 6733 157381 213155 4096 8 10389 9181 308044 492544 4096 16 20982 21127 361264 348569 4096 32 27605 45931 253167 632384 4096 64 31624 37531 564722 515342 4096 128 30480 48005 1483477 784690 4096 256 24403 57095 1490039 606274 4096 512 33105 92983 1525498 928801 8192 4 9113 9070 330071 324642 8192 8 8974 2019 305648 246382 8192 16 10829 29090 340526 438095 8192 32 26055 17389 817898 223118 8192 64 22380 14006 554486 363073 8192 128 16616 20626 470321 636117 8192 256 19523 27210 422401 408316 8192 512 32219 46166 988518 1262074 16384 4 6174 6175 162046 152704 16384 8 11347 11622 360848 175624 16384 16 12180 27175 710956 535040 16384 32 30580 34981 950624 733823 16384 64 34633 23271 455857 326627 16384 128 24038 29240 578024 381015 16384 256 57205 43478 847198 755268 16384 512 37907 54160 1274806 766181 32768 4 6422 7497 230539 400636 32768 8 12679 12302 468383 557507 32768 16 20419 12009 469859 409892 32768 32 13065 19190 627438 570442 32768 64 19446 25308 774056 610330 32768 128